17513117081 has 8 divisors (see below), whose sum is σ = 18277348680. Its totient is φ = 16759574272.

The previous prime is 17513117053. The next prime is 17513117101. The reversal of 17513117081 is 18071131571.

It can be written as a sum of positive squares in 4 ways, for example, as 5593225 + 17507523856 = 2365^2 + 132316^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17513117081 is a prime.

It is a super-2 number, since 2×17513117081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (17513110081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2668850 + ... + 2675403.

It is an arithmetic number, because the mean of its divisors is an integer number (2284668585).

Almost surely, 2^17513117081 is an apocalyptic number.

It is an amenable number.

17513117081 is a deficient number, since it is larger than the sum of its proper divisors (764231599).

17513117081 is a wasteful number, since it uses less digits than its factorization.

17513117081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5344395.

The product of its (nonzero) digits is 5880, while the sum is 35.

The spelling of 17513117081 in words is "seventeen billion, five hundred thirteen million, one hundred seventeen thousand, eighty-one".